Autonics PR12-4AO Cylindrical Inductive Proximity Sensor
The PR12-4AO Autonics Cylindrical Inductive Proximity Sensors provide 4mm sensing distance with AC 2-wire operation capability. PR12-4AO belongs to the Autonics sensing product lineup and the Autonics Proximity Sensors category for industrial automation applications. This model is part of the PR Series featuring M12 cylindrical housing, Normally Open output, IP67 protection structure, and 20Hz response frequency for industrial sensing systems.

| Brand | Autonics |
| Product Type | Proximity Sensor |
| Model Number | PR12-4AO |
Autonics PR12-4AO Cylindrical Inductive Proximity Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing side diameter | M12 |
| Sensing distance | 4mm |
| Hysteresis(distance) | Max. 10% of sensing distance |
| Standard sensing target | 12×12×1mm(iron) |
| Current specification | Leakage current: Max. 2.5mA |
| Control output | Normally Open |
| Wire type and power | AC 2-wire type100-240VAC~ |
| Installation | Non-flush |
| Cable Standard/material | Standard cable |
| Body length | Standard type |
| Insulation type | Double insulation or reinforced insulation(mark: @(INS), dielectric strength between the measuring input part and the power part: 1kV) |
| Residual voltage | Max. 10V |
| Environment_Ambient temperature | -25 to 70℃, storage: -30 to 80℃ |
| Environment_Ambient humidity | 35 to 95% RH, storage: 35 to 95% RH |
| Protection structure | IP67(IEC standard) |
| Material | Brass(nickel plated) |
| Response frequency | 20Hz |
| Weight | Approx. 84g(approx. 66g) |
The PR12-4AO Autonics Cylindrical Inductive Proximity Sensors are designed for industrial automation systems requiring stable non-contact metal detection. The PR12-4AO sensor supports 4mm sensing distance, AC 2-wire 100-240VAC operation, Normally Open output, and IP67 protection for industrial environments. This PR Series model uses a non-flush cylindrical installation structure suitable for automated machinery and production equipment requiring dependable sensing operation. PR12-4AO is widely integrated into machine automation systems for continuous industrial processes.
PR12-4AO proximity sensors are commonly used in conveyors, packaging machines, assembly systems, and industrial handling equipment. The sensor provides stable object detection without physical contact, helping reduce wear in repetitive automation operations. Its M12 cylindrical body allows installation in compact industrial machine layouts where reliable metal detection is required. The IP67 protection structure supports dependable operation in environments exposed to dust, vibration, and moisture. Autonics Cylindrical Inductive Proximity Sensors are suitable for industrial systems requiring stable switching performance and durable sensing construction.
Autonics PR12-4AO Cylindrical Inductive Proximity Sensors combine 4mm sensing distance, Normally Open output, and 20Hz response frequency for industrial automation applications. The PR12-4AO sensor supports reliable sensing performance with low leakage current and durable cylindrical construction for long-term machine operation. Autonics proximity sensors are widely selected across industrial automation sectors because of their consistent operation and installation compatibility. This PR Series sensor is suitable for engineers and industrial buyers requiring dependable inductive sensing solutions for packaging, assembly, and conveyor automation systems.




